Film-controlled indicator for moving-picture apparatus.



J. G. JONSON.

FILM CONTROLLED INDICATOR FOR MOVING PICTURE APPARATUS. APPLICATIONFILED 05019.1912.

1,%?2,671. Patented July 16, 1918.

2 SHEETS-SHEET I.

8 nve wtoz 33x alto (mew J. G. JONSON. FILM CONTROLLED INDICATOR FORMOVING PICTURE APPARATUS.

APPLICATION HLED DEC.19.1917.

Patented July 16, 1918.

2 SHEETSSHEET 2.

Fly. 5

5] nvamioc 951 Gum/ JOHN G. Jonson, or- SEATTLE, wasnmeaon.

FILM-CONTROLLED INDI IICATOR FOR MOVING-PICTURE APPARATUS.

Specification or Letters Patent.

Patented July 16, 1918.

Application filed December 19, "1917. Serial No. 207,971.

I To all whom it may concern: I

Be it knownthat- 1, JOHN (ah-Jonson, citizen of the-United States,residing at Seattle, in the county :of King and State of Washington,have invented certain new and useful Improvements in Film ControlledIndicators for Moving-Picture. Apparatus, ofvwhich the following is aspecification.

My invention .relates to improvements in film controlled indicators formovin pic ture apparatus, and the object ofmyinvention is to provide acombined indicatorand signaling device which shall be adapted tobefattached to the film magazine of moving picture apparatus theretooperate to,-.1nd1- cate the progress made inthe unwinding of v afilmfrom the. delivery reel contained in said magazine during'theoperation of said apparatus, and which shall embody adjustable means forproducing an audible signal at the required instant of time to warn-theoperator that the unwinding of said film is about tobe completed.

I" accomplish this ob ect by devices illustrated in the accompanyingdrawings, wherein,

Figure 1 is a view in front elevation of a film reel disposed within amagazine of a moving picture apparatus whose door is removed and towhich ma azine is attached a combined indicator an signaling deviceembodying my invention;

Fig. 2 is a view in elevation ofthe right hand side of said indicatorand signaling device when detached from said magazim; Fig. 3 is anenlarged fragmentary view in front elevation of said magazine and saidindicator and signaling device;

Fig. 4 is a viewin front elevation of a film reel disposed within amagazine whose door is removed and to which magazine is attachedamodified form of indicator and signaling device embodying my saidinvention; and

Fig. 5 is a plan view of saidimodified form of indicator and signalingdevice.

-Referring to they drawings, throughout which like reference numeralsindicate like parts, 6 designates the circular wall which is integralwith the rearward wall 7 of a film magazine containing the delivery filmreel of a moving picture apparatus of which reel only the rearward sideplate 8 and a section of its hub 9 is shown.

As shown in Fig. 1, the lower portion of the circular wall 6 is providedwith a transverse opening within which is disposed two rotatably mountedidler rollers 10 and 11 between which may travel a film to ,be

guided thereby as said film is unwound from' the hub 9 duringtheoperation of the moving picture apparatus with which the'magazinc isassociated.

Fastened to the outer side surface of the circular Wall. 6 is a bracket12 on the front side ofwhich is pivoted a pointer 13 by means of a pivotbolt 14. I

' Integral with the bracket 12 are two diverging arms 15 and 16 to whoseouter ends are integrally attached a scale plate 17 of the f0rm of asegment; of an annular plate, which scale plate is disposed in a circlethat is concentric with the pivot bolt 14.

Upon the face of the scale plate 17 is inscribed a scale of numbers asshown, which numbers may represent proportional lengths of a film infee. l

The outer edge portion of the Scale plate 17 is provided with anintegral stud 18 upon which is mounted a'signalbell 19. 7

A pivot member 20 is providedwith a shank of sm'aller'diameter, whichshank is disposed freel to project through and beyond a pivot caringhole formed in a In .22 that is integral with the arm 16,-whic pivotmember 20 is thus rotatively movable.

Secured to the pivot member 20 is the shank 23 of a bell hammer'2 i,which. shank 23 extends upwardly .for such distance as will cause thebell hammer 24 to strike the bell 19 in response to a rotative movementof the pivot member 20.

A movement of the shank-23 toward the bell 19is limited by a pin 25against which the shank 23 may strike justbefore-the bell hammer 24reaches thebell 19, the elasticity of said shank 23 permitting the bellhammer 24, by its momentum, to continue its movement to strike the bell19 and thereupon recede for a. slight distance from the bell 19 in anobvious manner not to interfere with the "vibrations of said bell 19.

Fastened to thepivot member 20 is an arm- 26 which extends downwardlyto'a point where it may operatively engage with the, end ofa thumb screw 27that is adjustably disposed in an angular bracket 28 that is fastened tothe'pointer 13, whereby a swinging movement of said pointer 13 willcause the end portion of the adjustable screw 27 to act on the arm 26 tomove the shank 23 away from the limit pin 25 to carry the bell hammer 24away from the bell 19 (in opposition to the force of a coiled spring 29that is associated with the pivoted member 20) until the end of saidadjustable screw 27 disengages the end of the arm26 in an obvious mannerto permit the coiled spring 29 to cause the bell hammer 24 to strike thebell 19.

' The screw 27 may be adjusted to disengage the end of the arm 26 at theinstant the pointer 13 points to any desired one of the numbers onthe'scale plate 17.

Integral with the pointer 13 is an arm 30 that is disposed to extendinto the magazine through a slotted opening 31 formed in the circularwall 6 at a point opposite the bracket 12, and the inner end of the arm30 is provided with a roller 32 which is disposed to engage with theperiphery of a roll of film, indicated by dotted lines in Fig. 1, thatis disposed on thehub 9 of a reel, whereby the position of the pointer13 will be governed by changes in the diameter of said roll of film assaid film is unwound from its reel.

For instance, when the diameter of the roll of film is great asindicated by the larger circular dotted line in Fig. 1 then the arm 30and pointer 13 will'be disposed as indicated by dotted lines in Fig. 1to show that there are about 1250 feet of film re- -maining unwound onthe reel, but when the diameter of the roll of film is small as indi;

cated by the smaller circular dotted line remaining unwound on the reel,at which positions the arm 26 may disengage the end of the screw 27 topermit the bell hammer 24 to strike the bell 19 to warn the operatorthat the film is almost unwound from the reel.

Obviously, the operator may ascertain the number of feet of filmremaining unwound on the reel at any instant of time during theoperation of the apparatus by observing the position of the pointer 13.

In Figs. 4 and 5 I have illustrated a modified form of my inventionattached to the circular wall, 33 that is integral with the rearwardside wall 34 of a film magazine within which is rotatably disposed afilm reel whose hub 35 is shown in cross-section. Y Mounted on the outerside of the top portion of the circular wall 33 is a guiding bracket 36which is provided with a hole of square cross-section that extendsvertically downward therethrough and through said circular wall 33,within which hole is slidably disposed a scale rod 37 of squarecrosssection on whose lower end portion is mounted a rotatable roller 38that engages with the outermost convolution of any roll of film that maybaa-disposed on the hub 35 whereby said rod may move downwardly as saidfilm is unwound from said hub 35.

In order to insure that the scale rod 37 shall move downwardly as theroll of film (represented by dotted lines in Fig. 4) decreases indiameter during the operation of the apparatus I have provided a helicalcompression spring 39 which is disposed to surround said scale rod 37 toextend between a pin 40 (which is driven through the lower portion ofsaid scale rod 37) and the inner surface of the circular wall 33.

The upper end portion of the scale rod 37 projects higher than the topof the bracket I clearly in Fig. 1, whereby a downward movement of thescale rod 37 will cause the screw 41 to engage with the top side of theadjacent end portion of the shank 42 to raise the bell hammer 43 untilthe said screw 41 slips off from said adjacent end of the shank 42 thusto permit the bell hammer 43 to strike a bell 45 that is fastened to abracket 46 which is attached to the circular wall 33.

The scale rod 37 is inscribed with a scale of division marks 47 whichmay indicate the changingdiameter of the roll of film on the hub 35 inan obvious manner.

The screw-41 may be adjusted to release the bell hammer 43 at theinstant of time that the roll of film has descreased in diameter to anydesired degree thus to Warn the operator by an audiblesignal that only acertain length of film remains unwound on the hub 35 of the reel, and byobserving the division marks 47 above the bracket. 36, the operator may,at any time during the operation of the apparatus, determine theprogress of the unwinding of the film from the hub 35 of the reel.

Obviously changes may be made in the I forms, dimensions and arrangementof parts of my invention without departing from the spirit thereof.

What I claim is:

A film-controlled indicator of the class described, which embodies 'afilm magazine within which is rotatably disposed a reel of film andwhich is provided with an opening through its surroundin wall; a bracketfastened to the outer surt ace of said surrounding wall in a positionadjacent to said opening; a signal bell mounted on said magazine m aposition distant from said opening; a bell hammer whose shank ispivotally attached to said bracket in a position to adapt said bellhammer to strike said bell in response to swinging movements of saidshank; mechanism associated with said shank of said-bell hammer and withthe outermost convolution of the film on said reel whereby whereby maybe indicated changes in the decreasing diameter of the roll of film on10 said reel during the process of unwinding said roll of film.

In witness whereof, I hereunto subscribe my name this 11th day ofDecember A. D.,

JOHN G. J ONSON.

